I’ve recently had a lot of success with the US by going very heavy in one theater for the first few turns. Â
If I want to go heavy in the East (all pieces placed in the East unless otherwise noted):
R1: 4 tranny’s, 1 CV, 1 DD  Place the EUS fighter and the Tac on the WUS carrier on the carrier purchased.  I also bring a loaded transport from WUS around the board and move an inf from WUS to CUS
R2: (assuming Japan has not declared war) 2 tranny’s, 2 inf, CV, 2 DD (WUS)
R3: Loaded tranny for EUS, spend the rest in WUS
By turn 3 US has 7 loaded transports ready to go to Gibraltar along with a 2 CV (one loaded), a C and a DD.  The Brit’s can lend a couple of planes to the second carrier for extra defense if needed.  This move puts a ton of pressure on the Germans and I’ve seen it force Japan to wait until turn 4 to attack.  Japan can get a big head start but with such an aggressive start in the East the US is able to spend most of its money in the West the rest of the way.
Heavy in the West:
R1: 2 CV, 1 BB (a standard move) Â You can bunch everyone in Hawaii, WUS or Johnston depending on what Japan is doing. Â Bring over the C and loaded tranny from EUS
R2: Loaded tranny in EUS to replace the one you took and a DD in case there are German subs floating around. Â CV, sub, DD in the West
From there on out I’ll buy a couple of loaded trannies a turn in the East and count on UK to protect the waters.  In the West I’ll buy loaded tranny’s, DD’s and sub’s the rest of the way. Â
From here I head to Caroline and then either A) take back the Philippines or B) take Java, plant a flag and start picking off the other islands with Anzac.  If Japan leaves any part of its navy vulnerable I’ll hit it. Â
Every plan has its flaws but I find my US play has increased significantly increased since I took a “Spend big on one side the first two turns†strategy